CN110927008A - A new type of slurry density measuring device for desulfurization system - Google Patents
A new type of slurry density measuring device for desulfurization system Download PDFInfo
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Abstract
The invention provides a novel desulfurization system slurry density measuring device which comprises a cabinet, an electric control unit and a measuring unit, wherein the electric control unit and the measuring unit are arranged in the cabinet; the measuring component comprises a measuring cylinder and an electromagnetic valve arranged on a pipeline at the outer end of the measuring cylinder, and the measuring cylinder is provided with an overflow port, a pH meter interface, a measuring opening, a slurry introducing opening and a dredging pipe opening. The measuring device has the advantages of high measuring precision, automatic cleaning function, good stability, small maintenance amount, economy and practicality, and is suitable for all application occasions of slurry density measurement.
Description
Technical Field
The invention relates to the technical field of environmental protection desulfurization, in particular to a novel desulfurization system slurry density measuring device.
Background
In a magnesium method, a sodium method, a calcium method and other desulfurization systems, the measurement of the slurry density directly affects the control of desulfurization efficiency and desulfurizer consumption, so that the method is a more critical measurement link. The currently popular measurement techniques can be categorized into three categories.
The first type is a radioactive densitometer, and the measurement principle is as follows: the density of the slurry is converted by measuring the nuclear radiation density dose passing through the slurry. The installation and application approval procedures of the radioactive instrument are complicated, and the radioactive instrument has certain radiation hazard to operators, so that the mainstream market is faded out at present, and the application occasions are few.
The second type is a mass flow meter, which is based on the coriolis measurement principle and changes the vibration frequency when the medium passes through a measuring tube with a fixed vibration frequency, and by measuring the vibration frequency, the density of the medium can be calculated. The installation requirements of the equipment are high, firstly, the measurement under the condition of full pipe must be ensured; secondly, because the measuring pipe diameter of the mass flowmeter is limited (generally between DN32 and DN 100), in order to prevent blockage caused by low flow rate, the mass flowmeter is usually considered to be arranged at the outlet of the pump in practical application, but the installation mode also brings negative effects, namely the measuring equipment is easy to wear, the damage rate is high, and the maintenance workload is large.
The third type is density measurement by a differential pressure method, and the measurement principle is Archimedes' law. The measurement mode is that a pressure difference delta P is measured by a pressure/pressure difference measuring instrument arranged on a tank, and then the slurry density rho is indirectly measured according to a formula rho ═ delta P/gh. At present, there are two kinds of applications. The first method comprises the following steps: the manometer was directly mounted on the tank for the slurry to be measured. For example, the measurement of the density of limestone slurry by a calcium method and the density of slurry by an absorption tower adopt the measurement mode, and the problems are that: this kind of measurement mode can receive the inside liquid of tank and rock the influence, like: the stirrer, the blowing-in of oxidizing air and the like can influence the liquid level height of the slurry, and the fluctuation of pressure difference is caused, so that the measurement accuracy and stability are not high; and the second method comprises the following steps: the model measurement, namely the measurement of draining the slurry out of the storage tank through a pipeline, avoids the disadvantages in the first case. However, the conventional sampling-type measurement method has the following defects: to ensure that the characteristics of the removed slurry are consistent with those of the source slurry being measured, it is necessary to continuously withdraw fresh slurry and measure, for example: at the time of T1, slurry at a source to be measured is extracted to a common sampling type measuring device for measurement, one measurement is completed at the time of T2, measurement data are uploaded, then, the slurry must be emptied before the next measurement, a measuring pipeline is flushed, new slurry is introduced again for re-measurement, the series of actions takes time T, in the time period T, real-time measurement is stopped, and in order to ensure the uninterrupted control of the desulfurization system, at the time of T2+ T, the control system can only maintain and utilize the measured value at the time of the last T2, therefore, the common sampling drainage measuring device has measurement hysteresis and is not monitored in real time.
Disclosure of Invention
The invention aims to provide a novel desulfurization system slurry density measuring device based on a differential pressure density measuring principle, so as to solve the problems in the background technology.
The technical problem solved by the invention is realized by adopting the following technical scheme: a novel desulfurization system slurry density measuring device comprises a cabinet, an electric control unit and a measuring unit, wherein the electric control unit and the measuring unit are installed in the cabinet, the measuring unit comprises two sets of redundant measuring assemblies and a connecting pipe fitting for connecting the measuring assemblies, and the two sets of measuring assemblies are respectively a measuring assembly A and a measuring assembly B which are consistent in structure; the measuring component comprises a measuring cylinder and an electromagnetic valve arranged on a pipeline at the outer end of the measuring cylinder, and the measuring cylinder is provided with an overflow port, a pH meter interface, a measuring opening, a slurry introducing opening and a dredging pipe opening; the overflow port is positioned on the side edge of the upper end of the measuring cylinder, and an external connecting pipe of the overflow port inclines downwards so as to facilitate the liquid to flow out; the pH meter interface is positioned at the middle part of the measuring cylinder and is far away from one end of the overflow port, and an external connecting pipe of the pH meter interface inclines upwards; the measuring opening and the slurry introducing opening are arranged at the lower part of the measuring cylinder, the measuring opening is positioned at the upper end of the slurry introducing opening, an external connecting pipe of the measuring opening is respectively connected with the pressure transmitter and the flushing water electromagnetic valve through a three-way pipe, and the slurry introducing opening is connected with the feeding electromagnetic valve through the external connecting pipe; the opening of the drainage pipe is positioned at the bottom of the measuring cylinder, the outer end of the opening of the drainage pipe is connected with a drainage pipeline, and a drainage electromagnetic valve for controlling on-off is installed on the drainage pipeline.
The further scheme of the invention is as follows: the connecting pipe fitting comprises an overflow pipe connected with the slurry ditch, a water pipe for conveying process water and a liquid pipe for conveying the slurry to be detected; the overflow pipe is connected with an overflow port at the upper end of the measuring cylinder, the water pipe is connected with the flushing water electromagnetic valve and used for flushing the measuring cylinder and the measuring component pipeline, and the liquid pipe is connected with the feeding electromagnetic valve and used for controlling the slurry to enter the measuring cylinder from the source.
The further scheme of the invention is as follows: the measuring component A and the measuring component B are respectively connected with the overflow pipe, the water pipe and the liquid pipe, and drainage pipelines at the lower ends of the measuring component A and the measuring component B are converged to send the discharge into the drainage ditch.
The further scheme of the invention is as follows: the outer end of the pH meter interface is plugged by a stainless steel blind flange.
The further scheme of the invention is as follows: the pressure transmitter is a flange type pressure transmitter, and a diaphragm of the pressure transmitter, which is in contact with the slurry, is made of stainless steel.
The further scheme of the invention is as follows: a measuring method of a novel desulfurization system slurry density measuring device is characterized in that a measuring component achieves the purpose of real-time measurement through a redundancy switching mode, the measuring component A and the measuring component B work alternately with each other through two sets of mutually redundant measuring components A and B, when data measured by the measuring component A keeps uploading in a continuous process, the measuring component B is put into use, when the measuring component B finishes measurement, the measuring component B is switched to and uploads a measuring result of the measuring component B, then when the measuring component B keeps uploading the measuring data in the continuous process, the measuring component A is put into use again, and therefore the two sets of measuring components work in a reciprocating mode in a circulating mode, and continuous monitoring of slurry density is completed.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention introduces the measured slurry into the measuring cylinder in the measuring unit in a sampling and drainage mode, so that the measuring process is not influenced by any vibration equipment, and if the slurry introduced into the measuring cylinder contains bubbles, the slurry is released through an overflow port at the top of the measuring cylinder, thereby ensuring the stability of the measuring condition of the slurry.
2. The invention overcomes the defects of a common sampling and measuring mode based on a density measuring principle of a differential pressure method, introduces a redundancy switching and measuring mode in order to realize continuous and uninterrupted real-time monitoring, mutually redundant two sets of measuring components A and B work alternately, the control logics of the two sets of measuring components are consistent, and the two sets of measuring components comprise program steps of cleaning, measuring, data uploading and the like.
3. The measuring device has the advantages of high measuring precision, automatic cleaning function, good stability, small maintenance amount, economy and practicality, and is suitable for all application occasions of slurry density measurement.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a measuring unit according to the present invention;
FIG. 3 is a schematic diagram of the operation of the real-time monitoring of the present invention;
FIG. 4 is a schematic control flow diagram of the measurement assembly of the present invention.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further described below by combining the specific drawings.
As shown in FIGS. 1-2,
the embodiment provides a novel slurry density measuring device of a desulfurization system, which comprises a cabinet 1, an electric control unit 2 and a measuring unit 3, wherein the electric control unit 2 and the measuring unit 3 are installed in the cabinet 1, the measuring unit 3 comprises two sets of redundant measuring components and a connecting pipe fitting for connecting the measuring components, and the two sets of measuring components are respectively a measuring component A4 and a measuring component B5 which are consistent in structure; the measuring component comprises a measuring cylinder 31 and an electromagnetic valve arranged on a pipeline at the outer end of the measuring cylinder 31, and the measuring cylinder is provided with an overflow port 32, a pH meter interface 33, a measuring opening, a slurry introducing opening and a dredging pipe opening; the overflow port 32 is positioned on the side edge of the upper end of the measuring cylinder 31, and an external connecting pipe of the overflow port 32 inclines downwards so as to facilitate the liquid to flow out; the pH meter interface 33 is positioned at the middle part of the measuring cylinder 31 and is far away from one end of the overflow port 32, and an external connecting pipe of the pH meter interface 33 inclines upwards; the measuring opening and the slurry introducing opening are arranged at the lower part of the measuring cylinder 31, the measuring opening is positioned at the upper end of the slurry introducing opening, an external connecting pipe of the measuring opening is respectively connected with a pressure transmitter 35 and a flushing water electromagnetic valve 36 through a three-way pipe 34, and the slurry introducing opening is connected with a feeding electromagnetic valve 37 through the external connecting pipe; the opening of the drainage pipe is located at the bottom of the measuring cylinder 31, the outer end of the opening of the drainage pipe is connected with a drainage pipeline 38, and a drainage electromagnetic valve 39 for controlling on-off is installed on the drainage pipeline 38.
In this embodiment, the connecting pipe includes an overflow pipe 11 connected to the slurry channel, a water pipe 12 for conveying process water, and a liquid pipe 13 for conveying slurry to be measured; the overflow pipe 11 is connected with an overflow port 32 at the upper end of the measuring cylinder 31, the water pipe 12 is connected with a flushing water solenoid valve 36 and used for flushing the measuring cylinder 31 and the measuring assembly pipeline, and the liquid pipe 13 is connected with a feeding solenoid valve 39 and used for controlling the slurry to enter the measuring cylinder from a source.
In this embodiment, the measuring module a4 and the measuring module B5 are connected to the overflow pipe 11, the water pipe 12 and the liquid pipe 13, respectively, and the drainage pipes 38 at the lower ends of the measuring module a4 and the measuring module B5 are collected to send the drainage to the drainage ditch.
In this embodiment, the outer end of the pH meter port 33 is plugged by a stainless steel blind flange.
In this embodiment, the pressure transmitter 35 is a flange-type pressure transmitter, and a diaphragm of the pressure transmitter 35 in contact with the slurry is made of stainless steel.
Specifically, during measurement, the feeding solenoid valve 37 of the measuring cylinder 31 is opened, the measured slurry is injected into the measuring cylinder 31 under pressure until the slurry fills the entire measuring cylinder 31, the excess slurry is discharged through the overflow port 32 above the measuring cylinder 31, then the feeding solenoid valve 37 is closed, and after a period of time, the liquid in the cylinder 31 to be measured is in a static state, and then the measurement is started. The measurement principle is completely based on the derivation of Archimedes' law, namely, the pressure of the liquid is the product of the density, the height and the gravity acceleration of the liquid, and is expressed by a formula: after the formula is deformed, rho is delta P/gh, and the density rho of the measured slurry can be conveniently obtained.
As shown in fig. 3, the present embodiment provides a measurement method of a novel desulfurization system slurry density measurement device, which achieves the purpose of real-time measurement by a redundancy switching manner, and completes measurement work by two sets of measurement components a4 and B5 which are redundant to each other and work alternately; the method specifically comprises the following steps: and when the measurement component B5 finishes measurement, the measurement component B5 is switched to and uploads the measurement result of the measurement component B5, and then the measurement component A4 is put into the measurement component B5 during the continuous process of keeping uploading the measurement data, so that the two sets of measurement components work in a reciprocating mode to finish continuous monitoring of the density of the slurry.
As shown in fig. 4, taking the measurement module a as an example, the control flows of cleaning, measurement, data uploading, etc. are as follows:
after the measurement is started, the feed solenoid valve 37 is confirmed to be in a closed state, and then a cleaning step is performed, wherein the cleaning frequency n1 can be set in the PLC as required, and two times of flushing are performed by default. In the cleaning process, the drainage solenoid valve 39 at the bottom of the measuring cylinder 31 needs to be opened, the delay time for opening the valve is X1, X1 can be set in PLC, the time for emptying liquid in the measuring cylinder 31 is accurate, the valve is closed after the grout in the measuring cylinder 31 is discharged, the flushing water solenoid valve 36 is opened again to flush the measuring cylinder 31 with water, the water injection time is X2, X2 can be set in PLC, the measuring cylinder 31 is completely filled with clear water, and overflow is generated and discharged to a grout ditch.
After the cleaning step is completed, before the measuring step is started, the liquid in the measuring cylinder is completely drained by opening the drainage solenoid valve 39 to prepare for introducing the slurry, and then the feeding solenoid valve 37 in the measuring assembly a4 is opened to wait for the slurry to enter and fill the whole cylinder and generate overflow, wherein the purpose of generating overflow is to ensure that the slurry can fill the whole measuring cylinder 31 to reach the designed measuring height h2, the waiting time is the measuring delay time X3, and the X3 is usually determined by actual product debugging and is an adjustable parameter.
When the feed solenoid valve 37 is closed, in order to satisfy stable pressure measurement, it is necessary to wait for the liquid in the measuring cylinder 31 to be not fluctuated after being stationary, and the waiting time is a measurement delay time X4, and X4 is usually determined by actual product debugging and is an adjustable parameter.
After the X4 time period ends, the pressure transducer 35 measures the pressure of the slurry in the cartridge 31, and the logic programmed controller (PLC) receives the pressure value, converts it to a density value according to the built-in formula ρ Δ P/gh2, and uploads it to the remote control system. The hold time for data upload to the remote control system is X5.
After the time period of X4 is over, the measurement module B5 is put into operation, the operation control flow is consistent with that of the measurement module A4, the measurement result of the measurement module B5 is switched and uploaded when the time period of X5 is over, and the measurement module A4 starts to enter a new round of cleaning, measurement and data uploading.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
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| CN201911358767.0A CN110927008A (en) | 2019-12-25 | 2019-12-25 | A new type of slurry density measuring device for desulfurization system |
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| CN201911358767.0A CN110927008A (en) | 2019-12-25 | 2019-12-25 | A new type of slurry density measuring device for desulfurization system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113552019A (en) * | 2021-05-25 | 2021-10-26 | 华电电力科学研究院有限公司 | Desulfurization slurry density measurement system and working method thereof |
| CN114135476A (en) * | 2021-09-23 | 2022-03-04 | 洛阳信成精密机械有限公司 | Pump detection device |
| CN115127641A (en) * | 2022-08-04 | 2022-09-30 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A radar still-pipe device suitable for liquid level detection of foam and turbulent eddy currents |
| CN116754428A (en) * | 2023-06-26 | 2023-09-15 | 中资互联网科技有限公司 | Liquid mineral dual-channel intelligent self-cleaning cycle collection device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205484262U (en) * | 2016-01-19 | 2016-08-17 | 江苏远东环保工程有限公司 | Measuring device is synthesized to desulfurization pH value, density |
| CN206479483U (en) * | 2017-03-01 | 2017-09-08 | 武汉立为工程技术有限公司 | A kind of flushable water anti-blocking absorption tower pH and density measuring equipment |
| CN211402032U (en) * | 2019-12-25 | 2020-09-01 | 浙江浙能迈领环境科技有限公司 | A new type of slurry density measuring device for desulfurization system |
-
2019
- 2019-12-25 CN CN201911358767.0A patent/CN110927008A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205484262U (en) * | 2016-01-19 | 2016-08-17 | 江苏远东环保工程有限公司 | Measuring device is synthesized to desulfurization pH value, density |
| CN206479483U (en) * | 2017-03-01 | 2017-09-08 | 武汉立为工程技术有限公司 | A kind of flushable water anti-blocking absorption tower pH and density measuring equipment |
| CN211402032U (en) * | 2019-12-25 | 2020-09-01 | 浙江浙能迈领环境科技有限公司 | A new type of slurry density measuring device for desulfurization system |
Non-Patent Citations (1)
| Title |
|---|
| 孙园园 等: "脱硫塔内浆液密度及pH值测量装置的改进研究", 东北电力技术, no. 07, 20 July 2018 (2018-07-20) * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113552019A (en) * | 2021-05-25 | 2021-10-26 | 华电电力科学研究院有限公司 | Desulfurization slurry density measurement system and working method thereof |
| CN113552019B (en) * | 2021-05-25 | 2024-03-22 | 华电电力科学研究院有限公司 | Desulfurization slurry density measurement system and working method thereof |
| CN114135476A (en) * | 2021-09-23 | 2022-03-04 | 洛阳信成精密机械有限公司 | Pump detection device |
| CN115127641A (en) * | 2022-08-04 | 2022-09-30 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A radar still-pipe device suitable for liquid level detection of foam and turbulent eddy currents |
| CN116754428A (en) * | 2023-06-26 | 2023-09-15 | 中资互联网科技有限公司 | Liquid mineral dual-channel intelligent self-cleaning cycle collection device |
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Application publication date: 20200327 |